Island



(No Model.)

'J. MUIR.

CLOTH STRETGHING MAGHINE. No. 527,441. Patented Oct. 16, 1894. 1} Cf c2 as c I on UNITED STATES PATE T OFFICE:

JAMES MUIR, PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE PHENIX IRON FOUNDRY, OF SAME PLACE.

CLOTH-STRETCH ING MACHINE.

SPECIFICATION forming part of Letters Patent No. 527,441, dated October ensea. Application filed October 31, 1893. SrialNo. 489,665. (No model.)

To all whom itmwy concern:

Be it known that 1, JAMES MUIR, a citizen of Great Britain, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Cloth-Stretching Machines; andIdo hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to tentering frames, my object being to provide more effectual means for stretching the fabric, and it consists in a novel joint for the tenter rails; and also in various details of construction and arrangement of parts as will be hereinafter described and referred to in the appended claims.

In the accompanying drawings illustrating my invention, Figure 1 is a side elevation of a portion of a tentering frame showing my improved joint. Fig. 2 is a cross sectional elevation of a portion of a machine to which my invention is applied. Fig. 3 is an elevation in detail of the pivot plate used in the joint. Fig. 4 is a plan of the same. Fig. 5 is an elevation in detail of the tenter rails at the joint; and Fig. 6 is a plan of the same.

In the drawings, 1) represents one of the standards of a tentering frame from which extend the usual cross arms A, and along each of these is adjustable a saddle 0 upon which the rails 0 C are supported. Motion is transmitted to the saddles by means of screw threaded shafts B suitably supported by the cross arms and entering threaded openings in the saddles, motion being given to all the threaded shafts by means of worm wheels fastened upon themby keys 0 and meshing with corresponding'gears 0 upon a power shaft E which extends the length of the frame.

Upon the saddle G is a plate 0' pivoted thereto through the opening 0 and provided near each end with a lug (J which lugs enter cavities, 0 provided therefor in the end of a tenter rail, thuspivoting each rail at its ends to one of the platesO'. To prevent these: rails from becoming vertically disarranged, tongues 0 project from one rail and enter recesses C in the abutting end of the adjacent rail, sufficient distance being left between neighboring rails, and the recesses 0 being sufficiently large to permita single rail, as 0 to be swung upon the pivot entering its cavity 0 without interference with an adjacent rail, as 0 Many forms -of ways for the tenter hook chains may be employed, but I prefer to use that illustrated. In this construction an angle plate F fits upon the rail 0 one part of said plate being raised a distance to admit the passage of the chain and then extending over the chain substantially parallel with the rail proper. ably secured to the rail by means of a bolt F passing through an opening in the angle plate, thus making it possible to use the same frame with various thicknesses of chains. A lip F may depend from the top of the plate F and this together with the plate G serves to prevent the chain from falling out of the way. The plate G is also made adjustable vertically to accommodate difierent sizes of chains, but chiefly to permit of the chain being removed by simply unfastening the plate and withdrawing the chain from the recess in the angle plate F.

From the foregoing it will be seen that an extremely simple and readily adjustable way is provided for the tenter hook chain, but the chief advantage of my frame lies in the use of the pivoted rail joint. All of the saddles may be adjusted by giving power to the shaft E, while should it be desired to further adjust any particular rail, the keys 0 upon the shafts passing through the saddles carrying the rail may be withdrawn and the saddles then moved by a crank applied to the ends of the shaft, .the particular pivot joint described giving free movement at the point of juncture.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. Ajoint for tenter rails, comprising an adjustable support, a separate pivot pin upon said support for each rail to be supported,

This angle plate is adjustadjustable support, pivot pins upon said supand rails fitting upon said pivot pins; sub stantially as described.

2. A joint for tenter rails comprisinga support, a plate pivoted upon said support, pivot pins upon said plate, and rails fitting upon said pivot pins; substantially as described.

3. A joint for tenter rails comprising an adjustable support, aplate pivoted upon said support, pivot pins upon said plate, and rails fitting upon said pivot pins; substantially as described. I

4. A joint for tenter rails comprising an adjustable support, pivot pins upon said support, rails fitting upon said pivot pins and means for preventing vertical displacement of the rails; substantially as described.

5. A joint for tenter rails comprising an port, rails fitting upon said pivot pins one of said rails having a recess formed therein, and 20 In testimony whereof I affix my signature in 50 presenceof two witnesses.

' JAMES MUIR.

Witnesses:

AUGUSTUS O. BOURN, Jr., EDWARD P. HUGHES. 

